Yes you can redirect in the workflow. However this is a reactive response. You can only do that when the requester complains about the request not getting approved.
The proactive way is to create the vacation rule
Vacation rule works well if it is done before the approver goes away.
You can also get the support/sysadmin user to create the vacation rule if not done by the approver1

Yes.. you can create Vacation rule for the required employee using SYSADMIN
Login.
Otherwise User himself needs to Create Vacation rule in order to delegate
or Transfer to required person in his absence.

The approver has an approval limit assigned but he sent it forward for more approval by clicking "approve and forward" instead of "approve" or when the requisitioner set up the approval path, they included more approval than they needed to.
Thanks
Linda Schotel